Sirius Black : I expect you're tired of hearing this, but you look so like your father. Except your eyes. You have...
Harry : My mother's eyes.
Sirius Black : It's cruel that I got to spend so much time with James and Lily, and you so little. But know this; the ones that love us never really leave us. And you can always find them in here.
Professor Snape : Reveal your secrets.
Professor Snape : Read it.
Harry : "Messrs. Mooney, Wormtail, Padfoot, and Prongs, offer their compliments to Professor Snape and... "
Professor Snape : Go on.
Harry : "... and request that he keep his abnormally large nose out of other people's business."
Sirius Black : Enough talk, Remus! C'mon, let's kill him!
Professor Lupin : Wait!
Sirius Black : I did my waiting! Twelve years of it! In Azkaban!
Professor Lupin : Very well, kill him. But wait one more minute. Harry has the right to know why.
Harry : I know why! You betrayed my parents! You're the reason they're dead!
Professor Lupin : No, Harry, it wasn't him! Somebody did betray your parents, but it was somebody who, until quite recently, I believed to be dead.
Harry : Who was it then?
Sirius Black : Peter Pettigrew! And he's in this room, right now! Come out, come out, Peter! Come out and play!